Portion of a diagnostic system



FIG. 1 is a perspective view of a portion of a diagnostic system showing our new design;

FIG. 2 is a front elevational view of the the portion of a diagnostic system of FIG. 1;

FIG. 3 is a rear elevational view of the portion of a diagnostic system of FIG. 1;

FIG. 4 is a right side elevational view of the portion of a diagnostic system of FIG. 1;

FIG. 5 is a left side elevational view of the portion of a diagnostic system of FIG. 1; and,

FIG. 6 is a top plan view of the portion of a diagnostic system of FIG. 1.

The broken lines shown in the drawings illustrate elements of the portion of a diagnostic system that form no part of the claimed design. 

CLAIM The ornamental design for a portion of a diagnostic system, as shown and described. 